A fingerprint has 40 unique characteristics, but an iris has 256, a reason retina scans are increasingly being used for security purposes.

A fingerprint has 40 unique characteristics, but an iris has 256, a

More from the Human Body Facts niche...

Human Body Facts

That bit between your nose and upper lip is called your philtrum. But

Human Body Facts

Women are better at smelling than men

Human Body Facts

At the other end of the scale, the femur (or thigh) bone is the largest

Human Body Facts

Everyone has one eye that is slightly stronger than the other

Human Body Facts

We have all have unseen, harmless microscopic creatures living in our

Human Body Facts

Corneas are the only tissues that don’t have blood